This dataset was generated under the project NE/T013494/1 (SNAP-DRAGON: Subpolar North Atlantic Processes - Dynamics and pRedictability of vAriability in Gyre and OverturNing)

Numbers correspond to the year number starting from 51 to 65 (i.e. 15 years of experiments in total, first 50 years of the spinup of the control run are not included).

Notations corresponds to the wind forcing used in the model.

In sensitivity tests we decomposed JRA55-do winds into three components corresponding to short-term subsynoptic variability (0–2 days), synoptic-scale variability ( 2–10 days), and low-frequency variability (more than 10 days) using low pass filter. 

WIND_LF refers to the experiment where we exclude synoptic plus higher frequency atmospheric variability from the forcing winds, leaving only the impact of low-frequency atmospheric variability on timescales larger than 10 days (i.e. the difference between the control and WIND_LF experiments allows us to see the impact of synoptic and higher frequency processes in the atmosphere). 

WIND_LF_SYNOP refers to the experiment where we filter out variability of surface winds on periods shorter than 2 days (i.e. the difference between the control run and WIND_LF_SYNOP allows us to see the impact of small cyclones and mesoscale variability).  

WIND_LF_SCALED refers to the experiment where we scale the low-frequency winds such that the total energy input (U2) over time in each grid cell remains consistent with the control run. In this way, in the WIND_SCALED_LF experiments, the synoptic and higher frequency variability is effectively filtered out; however, the magnitude of the wind speed does not change significantly.

References:
Ocean (lateral) forcing (repeated year; 1 May 2003 - 1 May 2004): Arctic Subpolar sTate Estimate (ASTE; https://doi.org/10.1029/2020MS002398)

Atmospheric (surface) forcing (repeated year; 1 May 2003 - 1 May 2004): JRA55-do based surface dataset for driving ocean–sea-ice models (https://www.sciencedirect.com/science/article/pii/S146350031830235X) 

MITgcm user manual: Marshall, J., Adcroft, A., Hill, C., Perelman, L., & Heisey, C. (1997). A finite-volume, incompressible Navier Stokes model for studies of the ocean on parallel computers. Journal of Geophysical Research: Oceans, 102(C3), 5753-5766; Adcroft, A., Campin, J.-M., Dutkiewicz, S., Evangelinos, C., Ferreira, D., Forget, G., et al. (2018). MITgcm user manual.